When he died no one went to the funeral, not a single soul came, or even sent a flower.

Parker isn't telling the truth at all. According to the Wikipedia entry on F. Scott Fitzgerald, his funeral was attended by twenty to thirty people, among them his daughter Scottie and his editor. Zelda, who was in a psychiatric institution at the time, may not have been in any condition to appear at the funeral. That's not a big attendance for someone so illustrious, but maybe it was deliberately kept private and quiet. No one wants a media circus at a loved one's funeral.

hey I just read that wikipedia section and it mentions the Parker thing which happened at a visitation before the actual funeral. But yeah basically I think he died a bit of a tragic figure compared to his earlier years so it's just something she was riffing on (right before the quote I posted here she was talking about how hollywood disrespected him)